Surgical pump



(No Model.) v2 sheets-sheen.

C. H. TRUAX.

- SURGICAL PFM?.

No. 487,136; Patented Nov. 29, 1892.

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lllllll lln UNrTsD STATES PATENT OFFICE.'

CHARLES H. TRUAX, OF CHICAGO, ILLINOIS.

SURGICAL PUMP.

SPECIFICATION forming part of Letters Fatent No. 487,136, dated November 29, 1892. Application tiled away s, 1892. serai No. 417,403. on mollen To civ/ZZ whom it may concern.'

Be it known that I, CHARLES H. TRUAX, a citizen of the United States, residing at'Chicago, in the county of Cook and State of Illi-3 nois, have invented certain new and usefulll Improvements in Surgical Pumps, of which;

the following is a specification.

My invention relates to that class of surgical pumps in which the liquid tllat is pumped is propelled through a compressible tube by a compressor traveling upon said tube; and it consists in certain details of construction fully set forth hereinafter and illustrated in the accompanying drawings, in which- Figure 1 is a perspective view of a surgical pump embodying myimprovements; Fig. 2, a vertical section on the line 2 2, Fig. 3; Fig. 3, a transverse section on the line 3 3, Fig. 2; Figs. 4 and 5, sectional views illustrating certain changes in construction embodying my improvelnents.

A is a curved support for a loop or bend l of the tube B, the said support being curved to correspond with the part of a circle having its center the axis of a shaft 7, which carries one or more compressors. These compressors lnay be of any suitable form, but are preferably shown in the form of rollers 2, each mounted upon a yoke 3, carried by the said shaft. Thus the compressors C C in the con` struction shown in Fig. 4 are ill the form of bent spring-blades secured to a hub 5 upoll the shaft 7, and the rotation of the shaft carries the conlpressors successively against the bend of the tube at the opposite side of the support, compresses the same, and propels the body of liquid along the tube, as in other surgical pumps of this character. The preferred construction, however, is provided with compressors in the form of rollers, as before described. Y

In order to adjust the compressors, in the first instance, and to vary the extent to which they shall act upon the tube to compress the same, means are used for moving the said colnpressors outward or inward from the shaf t. This has heretofore been effected as illustrated in Letters Patent granted to me September S, 1891, Nos. 459,055, 459,054, and 459,053; but an improved adjusting means is illustrated in the drawings, the same consisting of a shaft 8,

l having reverse threads at the opposite end extended into threaded tubes 9 9, connected with the yokes 8 3, said tubes sliding in radial openings in the hubs 5, and the shaft 8 is provided with a central wheel or disk 10, upon turning which, together with the shaft S, the tubes, yokes, and compressors upon opposite sides of the hub are simultaneously moved outward. or inward each to the same extent as the other. To permit the ready turning of the disk 10, the hub is flattened, so that the edges of the disk will extend beyond the faces of the same, thereby permit ting the thumb and forefinger to be applied to the opposite edges to rotate it.

It is desirable after the colnpressors have been adjusted to their proper positions to prevent them from being displaced, to which end I combine with the adjusting mechanism a suitable locking device for locking against any of the adjusted parts. A preferable form of locking device is a binding-screw 12, provided with a head 13 and extending through a threaded opening in one end of the shaft 7, so that its end can be brought against the periphery of the wheel l0 to hold the latter in place. The support A may be in the form of a flat plate or rigid bar bent so that aportion of the support conforms to a segment of the circle, and this portion may be greater or less, in the drawings being indicated as substantially a selnicircle, while the free ends of the plate or bar may extend tangentially with relation to the circle of which the support comprises a segment. The free ends of the segment are preferably separated from each other to form a space or opening between theln, as shown in the drawings, and this opening may be of greater or less extent. AS indicated, the support is in substantially the form of a horseshoe, with the central portion conforming to a segment of a circle, while the ends project therefrom tangentially, leaving a space between their ends. The support is preferably provided with loops 14 14 at the ends, serving as clamps or guides for the tube, and with standards 15 at opposite edges for supporting the sllaft 7, the said loops and standards serving to hold the tubes in place upon the support. The standards are shown as extending radially inward from the sup- IOO port, and the shaft is mounted in the standards. A preferable construction, however, is to provide the support with opposite side flanges 16 I6, forming, as it were, an intermediate groove, in which the tube lies andwhereby it is maintained in proper position with respect to the compressors. Such flanges may be cast directly upon the plate; but I prefer to make the support in two sections d b, each provided witha iiar1ge'l6,said sections being connected separably together, thereby facilitating the construction of the pump. As shown in Figs. l to 3, the section b is secured to the section ot by means of three screws 19, the section d being t-he largest; but in Fig. 5 the two sections are equal in extent and are provided with ears or flanges 20, through which pass the securing-bolts. In the construction shown in Figs. l to 3 the clamps or retainers at the ends of the support consist of inwardly-projecting lips 2l 21; but such clamps or retainers may be made in any suitable form.

As the instrument has very frequently to be carried in the pocket or packed in a case, I provide the shaft 7 with a handle D, consisting of two sections cd, hinged together at at, the section e being secured to the shaft 7, and the section d being capable of holding upon the section c for storing or transportation, as shown in dotted lines, Fig. 3.

To facilitate the supporting of the pump in operation, I provide the support A at the lower side with a finger 25, adapted to fit a socket in any suitable support X, provided with a binding-screw 26 for bearing against the iiattened side of the finger.

It will be seen that by providing a support for the tube in the form of a bent or curved plate, a portion of which conforms to the segment of the circle, while the sides of the support are practically open whether with or without the narrow side flanges, the tube is held properly in position in respect to the compressor or compressors, while access may be had at all times tothe tube along its entire extent to detect flaws or imperfections and to the compressors for the purpose of adjustment, while all the parts may be readily cleansed and subjected to sterilizing frequently with suitable antisceptic preparations.

Without limiting myself to the precise construction and arrangement of parts shown, I claim- 1. A surgical pump provided with a tube, one or more compressors, and means to operate them to carry them along the tube, and with asupport for the tube, comprising a rigid plate or bar, a portion only of which support conforms to a segment of a circle and having open sides to permit access to the tube and compressors, substantially as described.

2. The combination, in a surgical-pump, of a support in the form of a rigid plate or bar, a portion only of which support conforms to a segment of a circle and having open sides to permit access to the tube, the tube, guides for retaining the tube upon the inner face of the support, a transverse shaft carrying one or more compressors, and means for supporting the shaft, substantially as described.

3. The combination, in a surgical pump, of a rigid support, a portion of which conforms to a segment of a circle and the ends of which are separated to form a space between them, a tube mounted in the support, a transverse shaft carrying one or more compressors, and means for supporting the shaft, substantially as described.

4. The combination, in a surgical pump, of a rigid support, a portion of which conforms to a segment of a circle and the ends of which are separated to form a space between them, a tube mounted,v in the support, a transverse shaft carrying one or more compressors, and means for supporting the shaft, connected. to the support opposite the space between its ends, substantially as described.

5. The combination, in a surgical pump, of a support in the form of arigid bar, a portion of which conforms to a segment of a circle and having open sides, standards projecting radially inward from said support, and a shaft mounted in said standards, substantially as described.

6. A surgical pump provided with a tube, and a flange-support for the tube, divided vertically into two sections, vand means for securing the sections detachably together, substantially as described.

7. The combination, in a surgical pump, of a curved support for the tube, a transverse shaft, two compressors each carried by a part supported by and sliding at right angles to the shaft, and a transverse shaft having the reverse thread at its opposite ends entering threaded sockets in the supports for the compressors,provided with a disk l0,substantial1y as described.

8. The combination of the rotating shaft, one or more compressors, adj usting-screw and disk 10, and set-screw arranged to bear upon the adjusting screw, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES H. TRUAX.

Witnesses:

F. C. GREENE, E. E. PALMER.

IOO 

